The KIPS Transactions:PartC (정보처리학회논문지C)

Korea Information Processing Society (한국정보처리학회)
권호 표지
DOI QR코드

DOI QR Code

Adaptive TCP Retransmission Mechanism for Continuous Packets Loss on Wireless Evironment

무선환경에서 연속적인 패킷손실을 고려한 TCP 재전송 기법

  • 홍충선 (경희대학교 전자정보학부) ;
  • 강재신 (경희대학교 대학원 전자공학과) ;
  • 김대선 (경희대학교 대학원 컴퓨터공학과)
  • Published : 2004.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

We need to have an adaptive TCP protocol that can be tolerable on wireless network environement. TCP Westwood for use in the environe-ment that have a very high loss rate like a sattelite was proposed by modifying the existing bulk retransmission protocol. Bulk retransmission mechanism shows a highly enhanced performance on networks that have a very high loss rate but are prone to bursty loss networks. Also, it can exprience less performance on low late transmission environement. This paper proposes Adaptive Bulk Retransmission Mechanism that adjusts the number of bulk retransmitted packets based on the network conditions. The proposed mechanism was evaluated by using NS-2.

무선환경상에서 TCP는 유선과는 달리 비트 에러율을 가지기 때문에 이를 해결하기 위한 TCP가 필요하다. 위성망 같이 손실률이 매우 놓은 환경을 위해 TCP Westwood에서는 기존의 벌크 재전송(bulk retransmission) 기법을 보완하였다. 하지만 벌크 재전송 기법은 불필요한 데이터도 함께 재전송하기 때문에 무절제한 패킷 전송으로 인해 혼잡을 가중시킬 우려가 있으며 또한 손실률이 높지 않은 네트워크 환경에서는 전송속도가 낮아진다. 본 논문에서는 네트워크 상황에 따라 Bulk 재전송 패킷수를 조절하는 적응 벌크 재전송 메커니즘 (adaptive bulk retransmission mechanism)을 제시하였고 Markov 에러 모델에서 기존의 TCP Westwood보다 높은 전송 속도를 보임을 NS-2를 이용하여 검증하였다.

Keywords

References

  1. Behronz A. Forouzan, 'TCP/IP protocol suite,' international editions 2000, pp.271-31
  2. R. K. Balan, B. P. Lee, K. R. R. Kumar, L. Jacob, W. K. G. Seah, A. L. Ananda, 'TCP HACK: TCP header checksum option to improve performance over lossy links,' InfoCom, 2002 https://doi.org/10.1109/INFCOM.2001.916713
  3. Tom Goff, James Moronski, D. S. Phatak, 'Freeze-TCP : a true end-to-end TCP enhancement mechanism for mobile environment,' InfoCom, 2000
  4. H. Balakrishnan, S. Seshan, Eamir and R. H. Katz, 'Improving TCP/IP performance over Wireless Networks,' In Proc.1st ACM Conf. on Mobile computing and Networking, November, 1995
  5. Ajay Bakre and B. R. Badrinath, 'I-TCP : Indirect TCP for mobile hosts,' Tech. Rep., Rutgers University, May, 1995
  6. K. brown and S. Singh, 'M-TCP: TCP for Mobile Cellular Networks,' ACM computer Communications Review(CCR), Vol.27, No.5, 1997
  7. Floyd, S. and Henderson, 'The NewReno Modification to TCP's Fast Recovery Algorithm,' Internet RFC 2582, Experimental, April, 1999
  8. Ren Wang, Massimo Valla, M. Y. Sanadidi, and Mario Gerla, 'Adaptive Bandwidth Share Estimation in TCP Westwood,' In Proc. IEEE Globecom 2002, Taipei, Taiwan, R.O.C., pp.17-21, November, 2002 https://doi.org/10.1109/GLOCOM.2002.1189101
  9. Young Yong Kim and San-qi Li, 'Capturing Important Statistics of a Fading/Shadowing Channel for Network Performance Analysis,' 888 IEEE Journal on Selected Areas in Communications, Vol.17, No.5, May, 1999 https://doi.org/10.1109/49.768203
  10. C. Casetti, M. Gerla, S. Mascolo, M. Y. Sanadidi and R. Wang, 'TCP Westwood : Bandwidth Estimation for Enhanced Transport over Wireless Links,' In Proceedings of ACM Mobicom 2001, Rome, Italy, pp.287-297, July, 2001
  11. G. Yang, R. Wang, F. Wang, M. Y. Sanadidi and M. Gerla 'TCP Westwood with Bulk Repeat for Heavy Loss environments,' UCLA CSD Technical Report #020023, 2002
  12. S. Cen, P. C. Cosman and G. M. Voelker, 'End-to-End Differentiation of Congestion and Wireless Losses,' Proceedings of ACM Multimedia Computing and Networking 2002, SPIE, San Jose, CA, Vol.4673, pp.1-15, Jan., 2002